CODEWITHSUNDEEP
ioscore-datansmutablearray
Siddharthan
Siddharthan

Reputation: 141

Adding data from a NSMutableArray to a NSManagedObjectContext

I'm trying to add data into an attribute of a core data entity. 

Contents of contentArray: (
036,
038,
040,
041,
043,
044,
044,
043,
042,
041,
041,
042,
042,
042,
042,
041,
041,
042,
043,
044,
045,
046,
047,
048,
050,
053,
054,
056,
059,
060,
057,
055,
053,
051,
048,
046,
043,
035,
034,
033,
032,
031,
032
}

Given above is the sample contents of the mutable array. I'm trying to add it into a NSManagedObjectContext variable as given below:

  for (int i =0;i<[contentArray count];i++){
            int a =[[contentArray objectAtIndex:i] intValue];
            NSLog(@"value:%d",a);
            [newManagedObject setValue:[NSNumber numberWithInteger:a ] forKey:@"timeStamp"];
            // Save the context.
            NSError *error = nil;
            if (![context save:&error]) {  

            NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
            abort();
   }
  }

I just manipulated the default core data app for iOS where it adds a timestamp value to the table. The cells is being over written with previous value. Is there anything wrong with my implementation. How to add data rather than over writing datas of the content array? Any help would be greatly appreciated. Thanks

Upvotes: 0

Views: 414

Answers (2)

Dinesh Raja
Dinesh Raja

Reputation: 8501

This is a basic way to store data into core data..Check out this and change it for your code...

NSManagedObjectContext *context = [self managedObjectContext];
countryObject=[NSEntityDescription
                          insertNewObjectForEntityForName:@"Country" 
                          inManagedObjectContext:context]; 
countryObject.city = @"New york";
countryObject.people = [NSString stringWithFormat:@"%@",[yourArray objectAtIndex:i]];
NSError *error;
if (![context save:&error]) {
    NSLog(@"Whoops, couldn't save: %@", [error localizedDescription]);
}

Upvotes: 0

Ole Begemann
Ole Begemann

Reputation: 135548

You have to create a new managed object (and add it to your context) in every pass through the loop. As long as you always use the same object it's no wonder that your data gets overwritten.

On the other hand, you should probably put the saving code outside the loop.

Upvotes: 2

Related Questions